Is There Stem Cell Treatment Research Being Done for Ocular Histoplasmosis?

I was first diagnossed in 2002. My right eye was lasered 2x’s with hot laser. I remained stable until my left eye became active in 2005. I have had 3-PDT’s w/kenalog,just kenalog injections until the avastin was finally being given. to date I have had around 25 Avastin injections in my left, and recently my right eye has become active again, so now I am receiving injections in both eyes at the same time. I have had a 3-4 different ophthalmologists’ opinions and have been told by all of them that they have never seen so many spots in someone’s eyes before. My retina layers are quickly deteriorating, so I am looking for new treatments to help. If you know of any stem cell research/trials please let me know…I had found one online that was being done in Germany, but I was told it might not be legitimate. Any and all help will be greatly appreciated.